An experimental search for the K-pp bound state, which is considered the simplest kaonic nucleus, is performed by using the d(φ +Kφ +) reaction at J-PARC K1.8 beam line (J-PARC E27 experiment). The first data taking as a pilot run was carried out in June, 2012. The missing-mass spectrum of this reaction studied at the beam momentum of 1.7 GeV/c, which allows the production of (1405), was obtained for the first time and a significant peak shift by ∼40 MeV was observed in the Y∗ region. In a preliminary proton-coincidence analysis, a sharp spike due to the ∼N-\λN coupling and a broad enhancement around 2.3 GeV/c2, which might be attributed to the K-pp bound state, was clearly observed.
|Journal||Proceedings of Science|
|Publication status||Published - 2013|
|Event||15th International Conference on Hadron Spectroscopy, Hadron 2013 - Nara, Japan|
Duration: 2013 Nov 4 → 2013 Nov 8
ASJC Scopus subject areas